@book { KirchlichesSpitalweseninsterreich,
    title = "Kirchliches Spitalwesen in Österreich",
    author = "Ingeborg {Spitzer}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1135439"
}